query_question: There is a square five pile cap as shown in Figures 4-36. Known conditions: cushion cap thickness of 1.2m, effective height h0=1050mm, using C25 concrete (tensile strength design value ft=1.27MPa); Pile section size 0.4m * 04m; Column section size 0.6m * 0.6m. Calculate the punching shear bearing capacity Fl of the cushion cap as () kN.<image 1>
options: []
demo_question_list: The settlement calculation method considering stress history requires the indicators provided by the survey, in addition to the pre consolidation pressure In addition to force, compression index, and porosity ratio, the other indicators that should be provided are ()<image 1>
  A. Effective self weight pressure
  B.  Rebound index
  C. Average additional pressure
  D. Groundwater level
  
  Answer with the option's letter from the given choices directly. In the illustrated circuit, the consumption power of load RL is 72W. If the transformer voltage ratio k=5, the effective value of the transformer is U1 ()<image 1>
  A. equal to 120V
  B. equals to 4.8V
  C. and equals to 0.6V
  D. cannot be calculated
  
  Answer with the option's letter from the given choices directly. There is a device with a current actual value of P=8000 yuan and an estimated residual value of LN=800 yuan. The first year's The operating cost of the equipment is Q=600 yuan, and the annual deterioration increment of the equipment is equal. The annual deterioration value $\lambda $= four hundred Yuan, then the economic life of the equipment is () years.<image 1>
  A.  7.5
  B.  7.5
  C. 8
  D.  6
  
  Answer with the option's letter from the given choices directly. What do satellite 1, 2, 3 separately monitor in <image 1>?
  A. Earth's energy balance, Earth's water cycle, Earth's surface
  B. Earth's water cycle, Earth's energy balance, Earth's surface
  C. Earth's surface, Earth's water cycle, Earth's energy balance
  D. Earth's surface, Earth's energy balance, Earth's water cycle
  
  Answer with the option's letter from the given choices directly.